T-square and drawing-board.



PATENTED JUNE 30, 1908.

E. WERNER."

T-SQUARB AND DRAWING BOARD.

' APPLICATION TILED FEB. 13, 1908.

embodying the invention.

UNITED sTA'rps PATENT OFFICE.

EMIL WERNER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR 'IO ADRIAN ST. CLAIR GARMAN, OF PHILADELPHIA, PENNSYLVANIA.

T-SQUARE AND DRAWINGJBOARD.

T 0 all whom it may concern.-

Be it known that I, EMIL \VERNER, a citizen of the United States, residing in the city and county of Philadelphia, State of PennsyL vania, have invented a new and useful T- Square and Drawing-Board, of which the following is .a specification.

My invention consists of means for connectmg a T-square with a drawing board, whereby the former is held flat on the latter and may be conveniently shifted or moved to the right or left according to requirements of the use of the square, provision being also made for using the square on the board to about the extreme width of the latter, and other details are presented, as will be hereinafter described and pointed out in the claims. I

For the purpose of explaining my invention, the accompanying drawing illustrates a satisfactory reduction of the same to practice, but the important instrumentalities thereof may be varied, and so it is to be understood that the invention is not limited to the specific arrangement and organization shown and described.

Figure 1 represents a top or plan view of portions of a T-square and drawing board Fig. 2 represents a side elevation thereof. Fig. 3 represents a partial plan view and partial longitudinal section of a ortion thereof. Fig. 4 represents a side e evation of a detached portion. Fig. 5 represents a side elevation of another detached portion.

Similar letters of reference indicate corresponding parts in the figures.

Referring to the drawings :A designates a drawing board, and B designates a T- square, which, excepting the features of my invention applied'thereto, are of usual construction.

Connected with a side of the board, which in the present instance may be termed the front thereof, are the ears C, which extend at a right angle to the same and forwardly therefrom and form the bearings for the laterally slidable rod D, which, as is evident, is

arallel with the adjacent side of the drawing board.

On the ends of the rod D are the arms E, with which is connected the coiled-spring F, which latter is incased in a sheath G of soft rubber or other liable or elastic material, said spring and s eath when in normal posi- Specification of Letters Patent.

Application filed February 13, 1908.

Patented June 30, 1908.

Serial No. 415,683.

tion extending parallel with the rod D, as shown in dotted lines, Fig. 3.

On the underside of the cross-limb of the square B, is mounted the roller or pulley H, whose periphery is grooved and engages the sheath G as a runway, it being noticed that said sheath and consequently said spring G are distended or stretched owing to said roller, while the cross-limb of the square rests movably upon the adjacent edge of the board and is subjected to the pressure of said spring through the medium of the roller, consequently the square is connectedwith the board and prevented from separation therefrom, and held flat on the board, while it may be moved to the right and left over the board for uses to which it may be subjected.

The rod D is of greater length than the width of the board, and so may have either end shifted to some extent to the right or left beyond the board so as to place the inner edge of the blade of the square to about the extreme end of the board and so render almost the entire surface of the latter serviceable, it being evident that in shifting the rod, the spring F and sheath G follow the same and the latter yield as the roller is carried by the square to the right or left, and so continues to exert its pressure on the square at every position to which the latter may be placed over the board. The square may be removed from the runway, by being thrown off of the same in any suitable manner such as further flexing or distention of the runway.

In order to prevent the rod D from directly contacting with the openings of the eyes C, which would cause a scratching noise as the rod is shifted, there is interposed between said rod and openings the bushing J of soft rubber or other pliable or elastic material, the same covering said rod as a sleeve where it passes through said eyes, the effect of which is evident.

The arms E are of angular form, one limb E of each of which is inserted in the rod D, which is tubular, and the other limb E is outside of the same and has the spring F connected directly therewith.

In order to cause the arms to retain their pro or position on the ends of the tube D an prevent twisting or torsion of the spring F, said ends have recesses K, in which the limbs E are seated subjected to the draft of the spring F, as will be fully understood on I reference to Fig. 1 and to Fig. 5, where the limb E of one of the arms is shown in the act of entering the rod D.

The sheath Gr serves to cover the convolutions or coils of the spring F and prevent direct contact of the latter with the roller H, while also guarding the hands of the artisan from said coils, it also serving to rovide a smooth and noiseless surface on w iich said roller may run.

Having thus described my invention, what I claim as new and desire to secure by Let ters Patent, is

1. A drawing board having thereon a runway for movably connecting a T-square therewith, said runway being composed of a resilient member adapted to be flexed throughout its length by the engagement therewith of a projecting piece on the T- square.

2. In adrawing board, a resilient runway, and means on said board for connecting said runway therewith.

3. In a drawing board, a flexible runway composed of a coiled-spring, the ends of the latter being connectible with said board, and a T-square having a member adapted to moveon saidrunway and flex the same and retain the square on the board.

4. In a drawing board, a runway for the movable engagement of a member of a T- square when the latter occupies said board, said runway being composed of a resilient member, and said board having longitudinally slidable means connecting said last named member therewith.

5. In a drawing board, a resilient runway, a longitudinally slidable member adapted to be mounted on said board, and means for connecting said runway with said member.

6. In a drawing board, a longitudinally slidable member adapted to be mounted thereon, and a runway having its ends connectible with said member.

7. In a drawing board, a longitudinally slidable member adapted to be mounted thereon, a resilient device having its ends connectible with said member, and a tubular guard of pliable material inclosing said device. 8. In a drawing board, a member adapted to guide a square thereon, means on said board for mounting said member thereon, a coiled spring having its ends connectible with said member, and a sheath of pl able material inclosing the coils of said spring.

9. In a drawing board, a runway for a T-square, a member adapted to be mounted on said board, and arms on said member, said runway being adapted to be connected with said arms, said member having means in which certain portions of said arms may be stationarily seated.

10. In a drawing board, eyes thereon, a rod mounted in said eyes, a resilient runway connectible with the ends of said rod, and a sleeve of pliable material on said rod within said eyes.

JOHN A. WIEDERSI-IEIM, HARRY O. DALTON. 

